Mike,

While not an expert on the chemistries of the coating and the application equipment, there is one area that might get forgotten... ventilation and personal protective equipment.  Are the chemistries different enough to require different ventilation, filtering and respirators to meet the requirements of... shhhhhh... OSHA?

Phil

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Johnson
Sent: Friday, June 06, 2008 11:04 AM
To: [log in to unmask]
Subject: [TN] Changing conformal coating from silicone to urethane...

We are considering changing our pcb conformal coating process from a silicone base material to a urethane base material.  Other than a thorough cleaning of our machine, replacing material delivery lines, complete disassembly and cleaning of nozzles, ordering new nozzles to meet viscosity requirements of new material if necessary, are there other concerns we should be addressing?

Mike






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